Strainer



E. PICK ETAL STRAINER Filed June 20, 1946 EQIC PICK "4 JOSEPH. J.cAQLsoN INVENTORS BY Q ATTORNEY Patented Aug. 17, 1948 2,447,135s'raamnn Eric Pick, East Rockaway, N. Y., and Joseph J.

Carlson, Madison, N. 1., assignors to The Permutit Company, New York, N.Y., a corporation of Delaware Application June 20, 1946, Serial No.678,078

' Claims. (01. 210-24) 3 1 This invention relates to strainers forliquid treating apparatus including a tank and a liquid carrying pipeinside said tank, and it comprises a strainer having a tubular membermade of a reslllent material of the nature of soft rubber, said pipeextending into one end of said tubular member, screw means for fasteningthe other end of said tubular member to said tank, a cup-shaped memberfitted over said tubular member, and transverse passage means in saidtubular member interconnecting the inside of said tubular member and theinside of said cup-shaped memher, all as more fully describedhereinafter and as claimed.

Our invention is an improvement on the type of strainer or distributordisclosed in the U. 8. Patent 1,937,330 of Norman E. Brice, datedNovember 28, 1933.

The objects of our invention are to provide a strainer which can befabricated with ease and convenience and at relatively low cost; whichis not subject to corrosive action of liquids with which it comes incontact during use; and which obviates the need for a gasket in itsinstallation.

The manner in which these objects are achieved is shown in theaccompanyingdrawing in which:

' softening, sand when it is used for filtration, or

Fig. 1 is a vertical view, partly in section, of a liquid treating tankincluding a strainer in ,accordance with our invention;

Fig. 2 is a view, on an enlarged scale and partly in section, of thestrainer l3 of Fig. 1; and

Fi 3 is a modification of the strainer shown in Fig. 2.

Similar numerals refer to similar parts throughout the several views.

Referring now to Fig, l, the numeral Ill designates a liquid treatingtank having a bottom ll provided with a central opening l2 forattachment of our novel strainer l3. The tank is provided with a drainplug M. The tank III has a top It with a headring l6 permanentlyfastened thereto, as by welding. The headring I6 is provided with anopening I! and a smaller opening ll to which latter is fitted, as byexpanding therein, an S-shaped pipe or tube l9, extending to thestrainer l3. Attached to the headring It by means of screws or bolts 20is a multi-port rotary valve 21 provided with a hand-wheel 22cooperating with a pointer 23 to indicate the operating positions.Within the tank l0 and surrounding the strainer I3 is a layer 24 ofgravel or other suitable coarse material supporting the bed 25 ofgranular water treating material, such as zeolite when the apparatus isused for water activated carbon when it is used of taste and odor.

As shown-in Fig. 2-the strainer I 3 comprises a tubular member 30advantageously made of soft rubber. A hardness of about on the Shoredurometer type A is satisfactory, but by no means critical. While wehave found soft rubber particularly suited, the tubular member may, ofcourse, be made of some other equivalent resilient, non-brittlematerial, such as neoprene, buna or other suitable plastics. A screw 3|has a. knurled head 32 embedded in the lower portion of the tubularmember 30. The screw 3| projects through the opening I! in the bottom Hof the tank It, and'by means of a nut 33, the tubular member 30 isfastened to such bottom II. A circular ridge 34 formed on the lower faceof the tufor the removal bular member is pulled'ag'ainst the bottom ofthe tank when the nut 33 is tightened and thus provides a tight seal. Itshould be noted that for clarity of presentation the parts have beenshown in a condition which they occupy when the nut 33 has not beenfirmly tightened. When the nut 33 is properly tightened the ridge 34will be compressed and somewhat flattened, and the tubular member willbe pulled somewhat closer to the tank bottom II. The provision of theridge 34 is advantageous,.but not necessary since even the fiat face ofthe tubular member, being of the nature of soft rubber, will serve toprovide the required tight seal when pulled firmly against the bottom ofthe tank.

The tubular member is hollow with a taper at its upper end, as shown at31, to facilitate insertion of the tube I9 which rests on a shoulder 35.The upper portion of the tubular member is enlarged into an externalfiange 36, advantageously of hexagon shape for the purpose of permittinga socket wrench to fit thereover to hold the tubular member 30 while thenut 33 is being tightened.

Over the outside of the tubular member 30 is fitted a cup-shaped member38, provided with liquid distributing slots 39. Instead of such slots39, scallops or holes may be provided for suitable gravel 24 restingagainst it will not cause it to 'become distorted.

If desired the cup-shaped member 38 may also be made of metal. The upperend of the cup-shaped member 38 rests against the flange 36 on thetubular member and is thus held in place when the tubular member 30 isfastened to the tank.

In the tubular member ll are two passages -but any other desired numberor such passages may, of course. be provided-which establishcommunication between the inside of the tubular member ill and theinside of the cupshaped member 38.

In the modification shown in Big. 3 the cupshaped member 38 is providedat its top with an elongated cylindrical portion II, and a pin 42 isfitted through hole 44 in such elongated portion ti and holes 43provided in the tubular member 30. Thus. the placing of the pin 42, madeof brass, bronze, stainless steel or any other suitable material, keepsthe cup-shaped member attached to the tubular member even when thestrainer is removed from the tank. In this modification the lower end ofthe tube l9 rests against the pin 42.

In operation the flow of liquid is controlled by the multiport valve 2i.For instance, the incoming liquid may be admitted through the opening I!to flow downwardly through the bed 25 of liquid treating material andthe supporting layer 24. The liquid is then collected throughthe slots39 and continues through passages 40, and

thence upwardly through the tube i 9 and out through the valve 2|.

On the other hand, the liquid may be directed by the valve 2| into theupper end of the tube l9, downwardly through the tube, thence throughpassages 40 to the slots 39, which distribute it uniformly, to fiowupwardly through the tank l and out through opening i'l, backwashing thebed 25 of liquid treating material.

A strainer in accordance with our invention is highly efiicient andremains unafi'ected by water and most other liquids being treatedbecause of the nature of the materials used in its construction. It issimple and inexpensive to make, the tubular member and the cup-shapedmember being ready for use as they come from the mold, without requiringany further machine work. Being made of a relatively soft and resilientmaterial, the tubular member, when pulled up tightly against itssupport, makes its own seal, thus doing away with the need for aseparate gasket.

While we have shown what we consider preferred forms, modifications, maybe made without departing from the spirit of our invention and referenceis, therefore, made to the appended claims for a definition of the scopeof our invention. a

What we claim is:

1. A strainer for liquid treating apparatus ining a tank and a liquidcarrying pipe inside said tank, comprising a hollow tubular member madeof resilient soft rubber, said pipe extending into one end of saidtubular member, a screw having a head embedded in the other end of saidtubular member. a rigid cup-shaped member fitted over said tubularmember, liquid straining means on said cup-shaped member, and transversepassage means in said tubular member interconnecting the inside of saidtubular member and the inside of said cup-shaped member.

3. A strainer for liquid treating apparatus having a tank and a liquidcarrying pipe inside said tank, comprising a hollow tubular member madeof resilient soft rubber, an external flange adjacent to one end of saidtubular member, said pipe extending into said one end of said tubularmember, screw means embedded in said tubular member for fastening theother end of said tubular member to said tank, a rigid cup-shaped memberfitted over said tubular member and abutting said flange, liquidstraining means on said cup-shaped member, and transverse passage meansin said tubular member interconnecting the inside of saidtubular memberand the inside of said cup-shaped member.

4. A strainer for liquid treating apparatus having a tank and a liquidcarrying pipe inside said tank, comprising a hollow tubular member madeof resilient soft rubber, said pipe extending into one end of saidtubular member, screw means imbedded in said tubular member forfastening the other end of said tubular member to said tank, a rigidcup-shaped member fitted over said tubular member, liquid strainingmeans on said cup-shaped member, a pin fastening said cupshaped memberto said tubular member, and transverse passage means in said tubularmember interconnecting the inside of said tubular member and the insideof said cup-shaped member.-

5. A strainer for liquid treating apparatus having a tank and a liquidcarrying pipe inside said tank, comprising a tubular member made ofresilient soft rubber, said pipe extending into one end of said tubularmember, screw means imbedded in said tubular member for fasteningstraining means on said cup-shaped member,

and transverse passage means in said tubular member interconnecting theinside of said tubular member and the inside of said cup-shaped member.

eludin a tank and a liquid carrying pipe inside v said tank, comprisinga hollow tubular member made of resilient soft rubber, said pipe ex-.

tendin into one end of said tubular member,

- screw means embedded in said tubular member for fastening the otherend of said tubular memher to said tank, a rigid cup-shaped memberfitted over said tubular member, liquid straining means on saidcup-shaped member and transverse passage means in said tubular memberinterconnecting the inside of said tubular member and the inside of saidcup-shaped member.

2. A strainer for liquid treating apparatus hav- ERIC PICK. JOSEPH J.CARI-SON.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS

